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Claude 3 Opus

Anthropic · Claude Opus line · flagship

Released March 4, 2024Replaced by Claude Opus 4

Claude 3 Opus was released by Anthropic on March 4, 2024, as a flagship model in the Claude Opus line.

  • Release 3 of 11 in the Claude Opus line.
  • Came 104 days after Claude 2.1, released Nov 21, 2023.
  • Replaced by Claude Opus 4 on May 22, 2025, 444 days later.
  • These days the line ships a new model about every 60 days.

What changed

The top model of the Claude 3 family, with a 200K-token context window, priced at $15 / $75 per 1M tokens.

Sources: Anthropic

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Where the Claude Opus line stands

Claude Opus 5.5 is the current model in this line. The card shows how long it has been since the last release against the line's usual gap and its recent ones — the rhythm, not a date.

Claude Opus

Anthropic · flagship line

Latest: Claude Opus 5.5 · Sep 22, 2026

Mid-cycle32 days since the last release · usual gap 60 days

Anthropic's new Opus scores 7 points higher than Opus 5 on the all-round index and costs 20% less per token.

What changed in Claude Opus 5.5 →
Days since last release
32
days
Usual gap
60
days
Recent gaps
Claude Opus 5.5 · Sep 2026
60
Claude Opus 5 · Jul 2026
57
Claude Opus 4.8 · May 2026
42
Claude Opus 4.7 · Apr 2026
70

Every Claude Opus release

Newest first. See the full line with every card →

  1. Sep 22, 2026Claude Opus 5.5
  2. Jul 24, 2026Claude Opus 5
  3. May 28, 2026Claude Opus 4.8
  4. Apr 16, 2026Claude Opus 4.7
  5. Feb 5, 2026Claude Opus 4.6
  6. Nov 24, 2025Claude Opus 4.5
  7. Aug 5, 2025Claude Opus 4.1
  8. May 22, 2025Claude Opus 4
  9. Mar 4, 2024Claude 3 Opus · this page
  10. Nov 21, 2023Claude 2.1
  11. Jul 11, 2023Claude 2